Aperture-adjustable high-transmittance gravel screen

Abstract

The utility model provides a high transmittance sandstone screen with adjustable aperture, which comprises a frame, an edge baffle plate is arranged on the inner side of the frame, the frame comprises an upper frame body and a lower frame body which are symmetrically arranged up and down, a sliding positioning piece is arranged between the upper frame body and the lower frame body and close to one side where the edge baffle plate is arranged, and the sliding positioning piece is connected with the edge baffle plate. Inner sliding grooves are formed in the opposite faces of the upper frame body and the lower frame body, and the sliding positioning pieces are connected with the transverse ribs and the longitudinal ribs. The screen mesh is simple in structure, convenient to machine and low in use cost, through the technical scheme, the aperture of the screen mesh can be adjusted at any time according to actual needs, the requirement for frequent dynamic debugging of a screening system is met, meanwhile, the single-layer planar screen meshes formed by the transverse ribs and the longitudinal ribs have the advantage of being high in screening transmittance, and the screening efficiency is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sand and gravel screening equipment, in particular to a sand and gravel screen with adjustable aperture and high transmittance. Background Technique

[0002] In the field of engineering mechanism sand and gravel aggregates, screens are used to separate sand and gravel materials of different particle sizes. Material screening is achieved through the aperture of the screen. The size of the aperture and its matching degree with the screening target directly determine whether the screening target can be achieved. Due to the uncertainty in the individual material crushing process in the production process, the grading of the screening raw materials often fluctuates. It is necessary to dynamically adjust the screen aperture according to the grading characteristics of the screening raw materials to obtain finished aggregates that meet the grading and particle size requirements. However, replacing the screen usually takes time and effort, and it will cause the system to shut down, affecting production. Therefore, it is of great significance to realize the dynamic adjustment of the screen hole aperture of the fixed screen.

[0003] The comparative document CN221017283U discloses an oscillating screen with adjustable aperture, and its protected claim is: "Comprising an upper screen and a lower screen arranged in the screen machine body, the bottom of the upper screen is in sliding contact with the top of the lower screen, and a plurality of adjusting plates are fixedly installed on one side of the upper screen, and two positioning plates are fixedly installed on one side of the lower screen. The utility model relates to the technical field of oscillating screens. This oscillating screen with adjustable aperture realizes the convenient movement adjustment of the upper screen through the cooperation of the adjusting plate, the positioning plate, the lead screw and the two rotating caps, ensuring that the screen holes on the upper screen can be displaced relative to the screen holes on the lower screen, thereby realizing the adjustment of the effective screen hole aperture. The aperture adjustment is more comprehensive, and with the setting of the clamping and limiting assembly, the positions of the upper screen and the lower screen are reinforced, ensuring the relative stability of the positions between the upper screen and the lower screen during long-term oscillation, and thus ensuring the long-term stable use of the oscillating screen." However, this solution still has the following deficiencies: when the double-layer screens slide relative to each other, the overlapping area of the upper screen holes and the lower screen holes is always reduced compared to a single screen hole, the effective through area of the upper screen holes is reduced, resulting in dead volume, and it is easy to cause blockage during the screening process; adopting the double-layer screen method will extend the material passing path and reduce the passing rate under the same passing screen area, and the shape of the screen holes changes, making it easy to pass needle-like and flaky materials that do not meet the specifications; the premise of the overlap of the screen hole areas is that the screen hole density is low, so that the panel plane of the lower screen can shield the screen holes of the upper screen to achieve the purpose of adjusting the effective aperture, which will inevitably further reduce the passing rate.

[0004] Therefore, there is an urgent need for a sand and gravel screen with adjustable aperture and high transmittance to solve the above problems. Summary of the Invention

[0005] The purpose of the utility model is to overcome the above deficiencies and provide a sand and gravel screen with adjustable aperture and high transmittance to solve the problems raised in the background technique.

[0006] To solve the above technical problems, the technical solution adopted by the present utility model is: a sand screen with adjustable aperture and high transmittance, including a frame, on the inner side of the frame there is an edge baffle, the frame includes an upper frame body and a lower frame body which are symmetrically arranged up and down, between the upper frame body and the lower frame body, close to the side where the edge baffle is arranged, there is a sliding positioning member, on the opposite surfaces of the upper frame body and the lower frame body there are inner sliding grooves, and the sliding positioning member is connected with horizontal and vertical reinforcing bars.

[0007] Preferably, a plurality of reset springs are welded between the upper frame body and the lower frame body, and on the surface of the upper frame body close to the side where the horizontal and vertical reinforcing bars are arranged, there are ear pieces.

[0008] Preferably, a plurality of limit columns are arranged on the frame, one end of the limit column extends out from the semi-circular hole provided on the upper frame body, and the other end of the limit column is connected with the lower frame body.

[0009] Preferably, at the top of the limit column there is a long handle, on the column body of the limit column there are a plurality of limit blocks, at the bottom of the limit column there is a snap ring, and on the lower frame body there is a circular hole for the snap ring to be embedded.

[0010] Preferably, the edge baffle includes a baffle and a baffle movable shaft, the baffle movable shaft passes through the through hole on the ear piece of the upper frame body and can rotate coaxially; the baffle is fixedly connected with the baffle movable shaft and can be adjusted up and down within a certain range driven by the baffle movable shaft.

[0011] Preferably, the horizontal and vertical reinforcing bars include a horizontal bar and a vertical bar, the horizontal bar is arranged above the vertical bar, and the horizontal bar and the vertical bar are connected by a horizontal and vertical reinforcing bar connecting member.

[0012] Preferably, both the horizontal bar and the vertical bar are of cylindrical structure, at both ends of the horizontal bar and the vertical bar there are limit heads, and both ends of the horizontal bar and the vertical bar pass through the central hole of the sliding positioning member and are connected thereto.

[0013] Preferably, the horizontal and vertical reinforcing bar connecting member is composed of two sleeves which are fixedly welded and are perpendicular to each other in the projection plane, and the upper and lower sleeves are respectively passed through by the horizontal bar and the vertical bar.

[0014] Preferably, the sliding positioning member includes a sliding piece and a sliding shaft, at one end of the sliding piece there is a groove opened, at the other end of the sliding piece it narrows inward to form a plug adapted to the groove, in the plane parallel to the groove and the plug, through holes are opened at the center points of the sliding piece groove, the plug and the whole.

[0015] Preferably, the sliding pieces are connected end to end, the sliding shaft passes through the through holes at the groove and the plug ends to form a telescopic chain-like structure, and the sliding shaft is placed in the inner sliding grooves of the upper frame body and the lower frame body, and one sliding shaft in the middle of the top of each formed telescopic chain should fix its relative position, and the rest can slide freely.

[0016] The utility model has the following beneficial effects:

[0017] 1. In the utility model, multiple sliding plates are connected end to end to form a telescopic chain, which forms a narrowing of the intervals between the upper and lower frame bodies. When the telescopic chain narrows, its length extends, driving the change of the intervals of the horizontal and vertical reinforcing bars, and further changing the screen aperture formed by the intersection of the horizontal and vertical reinforcing bars, realizing the adjustment of the screen aperture, avoiding the frequent replacement of the screen during the commissioning process of the sand and gravel production system, and effectively improving the production efficiency and screening quality;

[0018] 2. When adjusting the size of the screening holes formed by the intersection of the horizontal and vertical reinforcing bars in the utility model, the aperture changes proportionally, the screening shape is regular and consistent, the particle shape of the screened material is controlled, the needle-like and flaky materials are restricted from passing through, and the screening quality is improved;

[0019] 3. In the utility model, a single-layer planar screening hole is formed by the intersection of the horizontal and vertical reinforcing bars. The projected area of the horizontal and vertical reinforcing bars is small, and the proportion of the effective screening area is large, improving the screening efficiency and the screen efficiency; at the same time, the screening path of the single-layer planar screening hole is short, avoiding the generation of ineffective screening volume (dead volume) and the occurrence of plugging holes, and further improving the material screening efficiency. Description of the Drawings

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model

[0021] Figure 2 It is a schematic diagram of the partial connection of the sliding positioning part of the utility model;

[0022] Figure 3 It is a schematic diagram of the structure of a single sliding plate of the utility model;

[0023] Figure 4 It is a schematic diagram of the connection structure between the sliding positioning part and the horizontal bar of the utility model;

[0024] Figure 5 It is a schematic diagram of the structure of the lower frame body of the utility model;

[0025] Figure 6 It is a schematic diagram of the structure of the upper frame body of the utility model;

[0026] Figure 7 It is a schematic diagram of the structure of the return spring of the utility model;

[0027] Figure 8 It is a schematic diagram of the structure of the limit post of the utility model;

[0028] Figure 9 It is a schematic diagram of the structure of the edge baffle of the utility model;

[0029] Figure 10 It is a schematic diagram of the structure of the horizontal and vertical bar connecting piece of the utility model. Detailed implementation mode

[0030] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments:

[0031] See Figure 1 and Figure 10 As shown in FIGS. and, a sand and gravel screen with adjustable aperture and high transmittance includes a frame 1. An edge baffle 2 is arranged on the inner side edge of the frame 1. The frame 1 includes an upper frame body 1.1 and a lower frame body 1.2 which are symmetrically arranged up and down. A sliding positioning member 3 is arranged between the upper frame body 1.1 and the lower frame body 1.2 near the side where the edge baffle 2 is arranged. Inner sliding grooves 1.5 are provided on the opposite surfaces of the upper frame body 1.1 and the lower frame body 1.2. The sliding positioning member 3 is connected to the horizontal and vertical reinforcing bars 4.

[0032] Preferably, a plurality of return springs 1.4 are welded between the upper frame body 1.1 and the lower frame body 1.2. An ear piece 1.1.1 is provided on the surface of the upper frame body 1.1 near the side where the horizontal and vertical reinforcing bars 4 are arranged. The ear piece 1.1.1 is fixedly welded to the outside of the upper frame body 1.1 in the direction of the horizontal and vertical reinforcing bars 4 and serves as a support seat for the movable shaft 2.2 of the edge baffle.

[0033] Preferably, a plurality of limit posts 1.3 are provided on the frame 1. One end of the limit post 1.3 extends out of a semi-circular hole 1.1.2 provided on the upper frame body 1.1, and the other end of the limit post 1.3 is connected to the lower frame body 1.2.

[0034] Preferably, a long handle 1.3.1 is provided at the top of the limit post 1.3. A plurality of limit blocks 1.3.2 are provided on the column body of the limit post 1.3. A snap ring 1.3.3 is provided at the bottom of the limit post 1.3. A circular hole 1.2.1 for embedding the snap ring 1.3.3 is provided on the lower frame body 1.2. When the handle is rotated, the limit blocks 1.3.2 overlap with the projection of the semi-circular hole 1.1.2, then the limit post 1.3 is unlocked. At this time, the interval between the upper frame body 1.1 and the lower frame body 1.2 can be adjusted. On the contrary, it is locked to fix the relative positions of the upper frame body 1.1 and the lower frame body 1.2.

[0035] Preferably, the edge baffle 2 includes a baffle 2.1 and a baffle movable shaft 2.2. The baffle movable shaft 2.2 passes through a through hole on the ear piece 1.1.1 of the upper frame body 1.1 and can rotate coaxially; the baffle 2.1 is fixedly connected to the baffle movable shaft 2.2 and can be adjusted up and down within a certain range driven by the baffle movable shaft 2.2.

[0036] Preferably, the horizontal and vertical reinforcing bars 4 include a horizontal bar 4.1 and a vertical bar 4.2. The horizontal bar 4.1 is arranged above the vertical bar 4.2. The horizontal bar 4.1 and the vertical bar 4.2 are connected by a horizontal and vertical reinforcing bar connector 4.3.

[0037] Preferably, both the transverse ribs 4.1 and longitudinal ribs 4.2 are cylindrical structures. Limiting heads 4.4 are provided at both ends of the transverse ribs 4.1 and longitudinal ribs 4.2. Both ends of the transverse ribs 4.1 and longitudinal ribs 4.2 pass through the central holes of the sliding positioning members 3 and are connected thereto.

[0038] Preferably, the transverse and longitudinal rib connecting member 4.3 is composed of two sleeves that are fixedly welded and are perpendicular to each other on the projection plane. The upper and lower sleeves are respectively penetrated by the transverse ribs 4.1 and longitudinal ribs 4.2. The transverse and longitudinal rib connecting member 4.3 is composed of two sleeves that are perpendicular to each other and respectively pass through the transverse ribs 4.1 and longitudinal ribs 4.2 to ensure that the transverse ribs 4.1 and longitudinal ribs 4.2 are in close contact. They cross to form sieve holes. The transverse and longitudinal ribs 4 are driven by the sliding piece 3.1 to change the arrangement interval, and further change the sieve hole size.

[0039] Preferably, the sliding positioning member 3 includes a sliding piece 3.1 and a sliding shaft 3.2. A groove 3.1.1 is opened at one end of the sliding piece 3.1. The other end of the sliding piece 3.1 is narrowed inward to form a plug 3.1.2 adapted to the groove 3.1.1. On the plane parallel to the groove 3.1.1 and the plug 3.1.2, through holes 3.1.3 are opened at the groove 3.1.1, the plug 3.1.2 and the center point of the whole of the sliding piece 3.1.

[0040] Preferably, the sliding pieces 3.1 are connected end to end. The sliding shaft 3.2 passes through the through holes 3.1.3 at the ends of the groove 3.1.1 and the plug 3.1.2 to form a telescopic chain-like structure. The sliding shaft 3.2 is placed in the inner sliding grooves 1.5 of the upper frame body 1.1 and the lower frame body 1.2. The relative positions of one sliding shaft 3.2 in the middle of the top of each formed telescopic chain should be fixed, and the rest can slide freely.

[0041] The working principle of this embodiment is as follows:

[0042] During use, first flip the edge baffle 2 to prevent the baffle 2.1 from hindering the arrangement displacement of the transverse and longitudinal ribs 4; then turn the handle of the limit post 1.3 to make the limit block 1.3.2 coincide with the semi-circular hole 1.1.2 to unlock the relative limit of the upper frame body 1.1 and the lower frame body 1.2; adjust the interval between the upper frame body 1.1 and the lower frame body 1.2 to an appropriate value. At this time, the telescopic chain formed by connecting the sliding pieces 3.1 end to end is narrowed or widened under the drive of the upper frame body 1.1 and the lower frame body 1.2. The sliding shaft 3.2 displaces, and the telescopic chain expands and contracts, driving the change of the arrangement interval of the transverse and longitudinal ribs 4. The transverse and longitudinal ribs 4 are in close contact and cross under the action of the transverse and longitudinal rib connecting member 4.3 to form sieve holes, and the sieve hole size changes, achieving the purpose of adjusting the aperture; then put down the edge baffle 2 to fit against the transverse and longitudinal ribs 4 to prevent sand and gravel materials from entering the locally ineffective screening area at the edge.

[0043] The above embodiments are only the preferred technical solutions of the present utility model and should not be regarded as limitations on the present utility model. The protection scope of the present utility model shall be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, the equivalent replacement improvements within this scope are also within the protection scope of the present utility model.

Claims

1. A sand screen with adjustable aperture and high transmittance, comprising a frame (1), characterized in that, An edge baffle (2) is provided on the inner side of the frame (1). The frame (1) includes an upper frame body (1.1) and a lower frame body (1.2) which are symmetrically arranged up and down. A sliding positioning member (3) is provided between the upper frame body (1.1) and the lower frame body (1.2) near the side where the edge baffle (2) is provided. Inner sliding grooves (1.5) are provided on the opposite surfaces of the upper frame body (1.1) and the lower frame body (1.2). The sliding positioning member (3) is connected to the horizontal and vertical reinforcing bars (4).

2. The aperture-adjustable high-transmittance sand screen according to claim 1, wherein A plurality of return springs (1.4) are welded between the upper frame body (1.1) and the lower frame body (1.2). Lugs (1.1.1) are provided on the surface of the upper frame body (1.1) near the side where the horizontal and vertical reinforcing bars (4) are provided.

3. The aperture-adjustable high-transmittance gravel screen according to claim 1, wherein A plurality of limit posts (1.3) are provided on the frame (1). One end of the limit post (1.3) extends out from a semi-circular hole (1.1.2) provided on the upper frame body (1.1), and the other end of the limit post (1.3) is connected to the lower frame body (1.2).

4. The high-transmittance gravel screen with adjustable aperture according to claim 3, characterized in that, A long handle (1.3.1) is provided at the top of the limit post (1.3). A plurality of limit blocks (1.3.2) are provided on the column body of the limit post (1.3). A snap ring (1.3.3) is provided at the bottom of the limit post (1.3). A round hole (1.2.1) adapted to the snap ring (1.3.3) is opened on the lower frame body (1.2).

5. A high-transmittance gravel screen with adjustable aperture according to claim 1, characterized in that, The edge baffle (2) includes a baffle (2.1) and a baffle movable shaft (2.2). The baffle movable shaft (2.2) passes through a through hole on the lug ( 1.1.1) of the upper frame body (1.1) and can rotate coaxially. The baffle (2.1) is fixedly connected to the baffle movable shaft (2.2) and can be adjusted up and down within a certain range driven by the baffle movable shaft (2.2).

6. The adjustable-aperture high-transmittance sand screen according to claim 1, characterized in that, The horizontal and vertical reinforcing bars (4) include a horizontal bar (4.1) and a vertical bar (4.2). The horizontal bar (4.1) is arranged above the vertical bar (4.2). The horizontal bar (4.1) and the vertical bar (4.2) are connected by a horizontal and vertical reinforcing bar connector (4.3).

7. An aperture-adjustable high-transmittance sand screen according to claim 6, characterized in that, Both the horizontal bar (4.1) and the vertical bar (4.2) are of cylindrical structures. Limit heads (4.4) are provided at both ends of the horizontal bar (4.1) and the vertical bar (4.2). Both ends of the horizontal bar (4.1) and the vertical bar (4.2) pass through the central hole of the sliding positioning member (3) and are connected thereto.

8. An adjustable-aperture high-transmittance sand sieve according to claim 6, characterized in that, The horizontal and vertical reinforcing bar connector (4.3) is composed of two sleeves which are fixedly welded and are perpendicular to each other in the projection plane. The upper and lower sleeves are respectively passed through by the horizontal bar (4.1) and the vertical bar (4.2).

9. An aperture-adjustable high-transmittance sand screen according to claim 1, characterized in that, The sliding positioning member (3) includes a sliding piece (3.1) and a sliding shaft (3.2). A groove ( 3.1.1) is opened at one end of the sliding piece (3.1). The other end of the sliding piece (3.1) is narrowed inward to form a plug (3.1.2) adapted to the groove ( 3.1.1). In a plane parallel to the groove (3.1.1) and the plug (3.1.2), through holes (3.1.3) are opened at the groove (3.1.1), the plug (3.1.2) and the center point of the whole of the sliding piece (3.1).

10. A sand sieve with adjustable aperture and high transmittance according to claim 9, characterized in that, The sliding pieces (3.1) are connected end to end. The sliding shaft (3.2) passes through the groove ( 3.1.1) and the through holes (3.1.3) at the ends of the bolts (3.1.2) form a retractable chain-like structure, and the sliding shafts (3.2) are placed in the inner sliding grooves (1.5) of the upper frame body (1.1) and the lower frame body (1.2). The relative positions of one sliding shaft (3.2) centered at the top of each formed retractable chain should be fixed, and the others can slide freely.

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